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Q. No.Identify the correct statement:
A:
For plants, herbivores are the predators.
B:
A wide variety of chemical substances (nicotine, caffeine, quinine, strychnine, opium, etc.,) are produced by plants actually as defences against grazers and browsers.
1. Only A is correct
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
Subtopic: Population Interactions: Predation |
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An example of brood parasitism is:
1. Lichens growing on tree bark
2. Mycorrhizae helping plant roots absorb nutrients
3. Barnacles attaching to whales
4. Cuckoo laying eggs in a crow’s nest
1. Lichens growing on tree bark
2. Mycorrhizae helping plant roots absorb nutrients
3. Barnacles attaching to whales
4. Cuckoo laying eggs in a crow’s nest
Subtopic: Population Interactions: Parasitism |
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Consider the given two statements:
| Statement 1: | Lichens and mycorrhizae are examples of mutualistic interactions where both species benefit. |
| Statement 2: | In mycorrhizae, fungi help plants in nutrient absorption, while plants provide fungi with energy-yielding carbohydrates. |
| 1. | Both Statement 1 and Statement 2 are correct. |
| 2. | Both Statement 1 and Statement 2 are incorrect. |
| 3. | Statement 1 is correct but Statement 2 is incorrect. |
| 4. | Statement 1 is incorrect but Statement 2 is correct. |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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Why do endoparasites have more complex life cycles?
| 1. | They generally need to survive in multiple hosts and environments. |
| 2. | They have well-developed sensory and locomotory structures. |
| 3. | Their reproductive potential is reduced due to host dependence. |
| 4. | They do not require special adaptations for survival. |
Subtopic: Population Interactions: Parasitism |
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How was the invasive prickly pear cactus controlled in Australia?
| 1. | By manually removing the cactus from rangelands |
| 2. | By using chemical herbicides extensively |
| 3. | By altering soil composition to prevent its growth |
| 4. | By introducing a cactus-feeding moth from its natural habitat |
Subtopic: Population Interactions: Predation |
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What does the parameter r represent in the population growth equation dN/dt = rN?
| 1. | Total number of individuals in a population |
| 2. | Per capita availability of resources |
| 3. | Intrinsic rate of natural increase |
| 4. | Total birth and death rates combined |
Subtopic: Population: Exponential Growth Model |
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Consider the given two statements:
| Assertion (A): | Population size, also known as population density (N), does not always have to be measured in terms of numbers. |
| Reason (R): | In some cases, measuring total number may be either meaningless or difficult, making alternative measures of population density more appropriate. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Population Attributes |
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What distinguishes a population from an individual organism in terms of birth and death?
| 1. | An individual has birth rates and death rates, while a population does not. |
| 2. | A population has birth rates and death rates, whereas an individual organism only has births and deaths. |
| 3. | An individual organism can have both per capita birth and death rates. |
| 4. | A population does not experience birth or death. |
Subtopic: Population Attributes |
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How does the Mediterranean orchid Ophrys achieve pollination?
| 1. | By offering nectar rewards to pollinators. |
| 2. | By releasing a strong fragrance to attract multiple insect species. |
| 3. | By mimicking the female bee to deceive male bees into pollination. |
| 4. | By using wind as the primary agent of pollination. |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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What is cryptic coloration?
| 1. | The use of bright colours to warn predators of toxicity. |
| 2. | The ability of an organism to blend with its surroundings to avoid detection by predators. |
| 3. | The rapid change of body colour to communicate with other members of the species. |
| 4. | The emission of bioluminescent light to attract prey. |
Subtopic: Population Interactions: Predation |
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